Sulphadimidine and its Impurities

Sulphadimidine, Sulfadimidine or sulfamethazine is a sulfonamide antibacterial. There are non-standardized abbreviations for it as "sulfadimidine" and as "sulfamethazine". Reference standards of Sulphadimidine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.